H has two, U has one and B has one, but HUB has none at all. What mathematics lies behind this?
Presented by David Morris.
For Schools
(Previously shown in November 1963)
(to 15.15)
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H has two, U has one and B has one, but HUB has none at all. What mathematics lies behind this?
Presented by David Morris.
For Schools
(Previously shown in November 1963)
(to 15.15)